Headlight-reflector.



H. M. PATCH. HEADLIGHT REFLECTOR. APPLICATION FILED 0:0.29. um.

1,292,637. Patented Jan. 28, 1919.

2 SHEETS-QHEET 1.

INVENTOR H rry M Pdfc/A AT ORNEY H. M. PATCH.

HEADLIGHT REFLECTOR. APPLICATION EILED DEC-29' 1911.

1,292,637. Patented Jan. 28, 1919.

. 2 SHEETS-SHEET 2- lNV ENTOR Harry M Pafc/z HARRY M. PATCH, OF SEATTLE,WASHINGTON.

HEADLIGHT-HECTOR.

' To all whom it may concern:

Be it known that I, HARRY M. PATCH, a citizen of the United States,residing at Seattle, in the county of King and State of Washington, haveinvented certain new and useful Improvements in Headlight-Reflectors, ofwhich the following is a specification.

This invention relates to reflectors and, more particularly, toreflectors for the headlights of automobiles and the like. The obj ectof the invention is to provide a reflector of this character possessingadvantages over others by directing the rays emanating from the light tobetter illuminate the roadway in front of a vehicle-with an absence ofglare in the eyes of approaching drivers or pedestrians. 1 I

These objects are attained by the novel construction of a reflectorformed of a plurality of paraboloid segments arranged and combined in anovel manner.

In the accompanying drawings, Figure 1 is a diagrammatic view invertical longitudinal section of a reflector embodyin the preferred formof my invention. Fig. 2 is a diagrammatic view in horizontal sectionshowing the segments of the lower half of the reflector illustrated inFig. 1. Fig. 3 is a front elevation'of the reflector shown in thepreceding views. Fig. 4 is a view similar to Fig. 1 illustrating amodified form of the invention. Fig. 5 is a diagrammatic view inhorizontal section showing the parts of the lower half of the reflectorillustrated in Fig. 4. Fig. 6 is a front elevational view of Fig. 4. r

In carrying out my invention I provide a reflector composed of a numberof paraboloid segments. Referring first to Figs. 1, 2 and 3, Arepresents the upper half of a reflector which is of approximately ahalf of a paraboloid whose lower edge is in horizontal plane through themajor axis X of a paraboloid. The lower half of the-reflector is, asshown in these views, formed of a lower se central lower segment B andside segments C, the latter being disposed in the spaces between theupperzand ower segmentsA and B atopposite sides of the reflector. The

ent B has-its major axis correspond w1th the axis Xof the segment A butis set forward in respect to the latter to have its focus, indicated byb in Fig. 1, in

Specification of Letters Patent.

Patented Jan. 28, 1919.

Application filed December 29,1917. Serial No. 209,418.

advance of the focus indicated by a of the segment A.

The side segments C are disposed to have their foci a substantially in avertical plane extending transversely through the focus a and somewhatbelow the axis x in which the foci of the segments A and B are located,the same being effected by swinging segments C laterally outward aboutpivotal points corresponding to upper forward corners y of therespective side segments and axes indicated by lines 00 parallel withand in approximately a horizontal plane extending through the aforesaidmajor axis x.

The light source S for a reflector constructed as above described, ispositioned in the axis a: between the foci a and b. The

light rays from the source S will accordingly be reflected-from anypoints, as P, upon the segment A indownwardly inclined lines R Reflectedlight rays from any points, as P, on the lower segment B, as indicatedby R will be directed downwardly (see Fig. 1) and also, as representedin Fig. 2, in substantially parallel lines with respect to a verticalplane projected through the axis a'. The light rays reflected frompoints as P on the side segments C will be directed downwardly, as R(Fig. 1), and in converging lines in horizontal directions, asrepresented by R in Fig. 2.

In-the modified form of my invention as shown in Figs. 4, 5 and 6, towhich reference is now had, the upper and side segments A and C aresimilar in shapes and relative positions to the correspondmg part of theabove-described preferred embodiment of the invention. In this instance,however, I employ a divided lower se ent whose parts are designated by Ban E, arranged one in front of the other and characterized by having theforward member B raised above, an the rear member B disposed below, aparaboloid surface indicated by dotted line W in Fig. 4, which would beproduced by the rotation about the axis :12 of the parabola generatingthe upper segment A.

The li t rays emanating from the source of light 5 in the embodiment ofthe inventionshown in Fi 4, 5 and 6, are reflected in directions siml arto the correspondingly designated li ht rays with respect to theembodiment own in Figs. 1, 2 and 3 -that is to say, the rays aredirected downwardly from all of the reflector segments and thosereflected by the side segments are furthermore caused to converge infront of the headlight.

By such regulation of the light, the roadway in advance of an automobileprovided with my improved headlight reflectors, will be illuminated withan absence of glare and without the loss of light from rays divergingfrom the path of the vehicle.

What I claim, isv 1. A headlight reflector the upper half of whichconsists of a single parabolic part,

' and the lower half of side and lower parabolic segments, said segmentsbeing arranged to present the foci of the side segments below ahorizontal plane extending through the focus of said upper part and inadvance of said focus and the focus of said lower segment in thereferred to plane and in front of the focus of said upper part.

2. A headlight reflector having a substantially half-parabolic uppersegment, a lower parabolic segment positioned to have its focus inadvance of the focus and in the major axis of said upper segment, andside parabolic segments located between the upper and lower segments,said side segments being inclined laterally so as to position theirfoci' in a plane subjacent to the foci of the first-named segments.

3. A headlight reflector having a substan- Gopiee of this patent may beobtained for racers? tially half-parabolic upper segment, lowerparabolic segments disposed one in front of the other, and arranged tohave the respective reflecting surfaces thereof outside and inside of aparaboloid surface generated about the axis of said upper segment andside parabolic segments having their reflecting surfaces in tangentialrelations to the referred-to paraboloid surface. 7

a. In a headlight reflector provided with upper and lowerparabolicsegments having a common major axis, parabolic segmentsinterposed between the aforesaid segments at opposite sides of thereflector and having their axes of paraboloidal generation located belowthe axis of said upper and lower segments.

5. In a lamp, a reflector comprising upper, lower, and side parabolicsegments, the upper and lower 0 said segments having a common major axisand with their foci disposed one in advance ofthe other, said sideparabolic segments being arranged to have their axes below the plane ofthe axis of the upper and lower segments, and a light source locatedsubstantially on the axis of both the upper and lower segments andbetween the foci thereof. 1

Signed at Seattle, Washington, this 22nd day of December, 1917.

HARRY M. PATCH.

Witness:

E. PETERSON.

five cents each; by addressing the "Gcmmiaeicncr or Esteem Washington,D. t.

